Behavior involves multiple parts of the brain. In the forebrain, the
limbic system, both the prefrontal and frontal cortices, and the hypothalamus
are involved. The limbic system controls motivation, emotion, instinct,
and sexual drive. The prefrontal and frontal cortices control learning
and personality. The hypothalamus is involved in visceral and autonomic
functions and thus controls behavior through endocrine secretions.
Behavior is best assessed with a thorough history from the client. One
should be sure to cover any history of aggression, elimination problems,
or appetite abnormalities the patient may have. Any changes in behavior
should be noted.